Antarctica’s Ross Ice Shelf roughly straddles the 180-degree-longitude line. In recent years large icebergs have been calving off the margin of the shelf, which is a large sheet of ice that hangs out over the continental land mass and floats in the Southern Ocean. This true-color <a HREF="http://modis.gsfc.nasa.gov" target="outlink">Moderate Resolution Imaging Spectroradiometer</a> (MODIS) image from the <a HREF="http://terra.nasa.gov/" target="outlink">Terra</a> satellite on December 13, 2002. Sensor: Terra/MODIS. Data Start Date: 12/13/02. Data End Date: 12/13/02.